Unicycles Koxx Troll Trials Unicycle, White, 22.86cm/20-InchThe Troll 20 inch Trials Unicycle is built on a sturdy frame and oversized 20 inch wheel. This trials unicycle is made to professional spec.$280.94http://ecx.images-amazon.com/images/I/41-DpSF76RL._SL160_.jpg